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USER MANUAL – Release 1.2 of 01/01/2010
Page 161 of 191
Version: 02/03/2010
57.10
AIR/AIR UNIT EVAPORATOR/CONDENSER AIR OUTLET LOW TEMPERATURE
IN COOLING WORKING MODE ANTI-FREEZE ALARM
Display label meaning
b1AC..b4AC
(anti-freeze alarm in circuit n° 1..4 cooling working mode)
b1Ac..b4Ac
(anti-freeze alarm signal in circuit n° 1..4 cooling working mode)
With alarm activated from evaporator input probe or evaporator common
output or just an anti-freeze alarm ID configured, all labels are displayed
Cause of activation
In working and in stand-by OFF remote mode id regulation probe for the Pbr
anti-freeze measures a temperature AL34 set for at least AL36 seconds
With ID configured as anti-freeze alarm and ID active
Reset
Regulation probe for Pbr anti-freeze measures a temperature > A34+ set +
AL35 differential
With ID not active
Reset
Automatic – becomes manual after AL37 interventions/hour (reset procedure in
functions menu)
Icon
flashing
Action
If AL38 = 0 only the compressors are switched off. The label alarm is signalled
by the alarm relay, buzzer and the heaters are not activated
If AL38 = 1 the compressors are switched off. The label alarm is signalled and
the alarm relay + buzzer are activated. If the anti-freeze alarm comes from ID
the anti-freeze heaters are also activated
Regulators
Alarm
If AL38 = 1 Relay + buzzer act anti-freeze heaters
Reverse valve
it follows its regulation
Recovery valve
it follows its regulation
Free-cooling on/off valve
it follows its regulation
Auxiliary relay
It follows/they follow its/their regulation
Idle running valve
It follows its regulation
Supply ventilation
If air/air unit off
Condensation ventilation
It follows its regulation
Support/boiler/anti-freeze
If air/air unit off otherwise follows its regulation
Support/boiler/anti-freeze
With ID alarm activated
Pump/and water evaporator
and condenser
They follow their regulation
Compressors
Off
Pump down solenoid valve Off
